---@diagnostic disable: duplicate-set-field, need-check-nil, param-type-mismatch, assign-type-mismatch
local activity = require 'bugabinga.pivi.activity'

local scratch = function( lines )
  vim.cmd 'enew'
  local bufnr = vim.api.nvim_get_current_buf()
  vim.api.nvim_buf_set_name( bufnr, vim.fn.tempname() .. '.lua' )
  vim.api.nvim_buf_set_lines( bufnr, 0, -1, false, lines )
  return bufnr
end

describe( 'pivi activity', function()
  after_each( function()
    vim.cmd 'silent! %bwipeout!'
    activity.clear_trail()
    vim.fn.setqflist( {}, 'r' )
  end )

  it( 'marks changed lines in its own namespace', function()
    local bufnr = scratch { 'one', 'two', 'three', }
    activity.mark_edit( bufnr, { { first = 0, last = 2, }, } )

    assert.equal( 2, #activity.marks( bufnr ) )
    assert.same( { { buffer = bufnr, first = 1, last = 2, }, }, activity.trail() )
  end )

  it( 'leaves foreign extmark namespaces untouched', function()
    local bufnr = scratch { 'one', 'two', }
    local foreign = vim.api.nvim_create_namespace 'some-language-server'
    vim.api.nvim_buf_set_extmark( bufnr, foreign, 0, 0, {} )

    activity.mark_edit( bufnr, { { first = 0, last = 1, }, } )
    activity.clear_trail( bufnr )

    assert.equal( 1, #vim.api.nvim_buf_get_extmarks( bufnr, foreign, 0, -1, {} ) )
    assert.equal( 0, #activity.marks( bufnr ) )
  end )

  it( 'keeps the trail across further agent edits', function()
    local bufnr = scratch { 'one', 'two', 'three', }

    activity.mark_edit( bufnr, { { first = 0, last = 1, }, } )
    activity.mark_edit( bufnr, { { first = 2, last = 3, }, } )
    vim.api.nvim_exec_autocmds( 'TextChanged', { buffer = bufnr, } )

    assert.equal( 2, #activity.marks( bufnr ) )
  end )

  it( 'clears the trail once the user changes the buffer', function()
    local bufnr = scratch { 'one', 'two', }

    activity.mark_edit( bufnr, { { first = 0, last = 1, }, } )
    assert.equal( 1, #activity.marks( bufnr ) )

    vim.api.nvim_buf_set_lines( bufnr, 0, 1, false, { 'edited by hand', } )
    vim.api.nvim_exec_autocmds( 'TextChanged', { buffer = bufnr, } )

    assert.equal( 0, #activity.marks( bufnr ) )
    assert.same( {}, activity.trail() )
  end )

  it( 'renders ghost text without mutating the buffer', function()
    local bufnr = scratch { 'one', 'two', }
    local revision = vim.api.nvim_buf_get_changedtick( bufnr )
    local before = vim.api.nvim_buf_get_lines( bufnr, 0, -1, false )

    activity.ghost( bufnr, 0, 'proposed\nchange' )

    assert.equal( 1, #activity.ghost_marks( bufnr ) )
    assert.equal( revision, vim.api.nvim_buf_get_changedtick( bufnr ) )
    assert.same( before, vim.api.nvim_buf_get_lines( bufnr, 0, -1, false ) )
  end )

  it( 'replaces earlier ghost text and clears on demand', function()
    local bufnr = scratch { 'one', }
    activity.ghost( bufnr, 0, 'first' )
    activity.ghost( bufnr, 0, 'second' )
    assert.equal( 1, #activity.ghost_marks( bufnr ) )

    activity.ghost_clear( bufnr )
    assert.equal( 0, #activity.ghost_marks( bufnr ) )
  end )

  it( 'ignores empty ghost text', function()
    local bufnr = scratch { 'one', }
    activity.ghost( bufnr, 0, '' )
    assert.equal( 0, #activity.ghost_marks( bufnr ) )
  end )

  it( 'publishes cross file findings to the quickfix list', function()
    local entries = activity.findings( {
      { path = 'a.lua', line = 3, column = 2, text = 'first', severity = 'error', },
      { path = 'b.lua', line = 1, text = 'second', },
    }, 'review' )

    assert.equal( 2, #entries )
    local list = vim.fn.getqflist()
    assert.equal( 2, #list )
    assert.equal( 3, list[1].lnum )
    assert.equal( 'first', list[1].text )
    assert.equal( 'review', vim.fn.getqflist( { title = 0, } ).title )
  end )

  it( 'publishes window findings to the location list', function()
    activity.window_findings( 0, { { path = 'a.lua', line = 2, text = 'local', }, }, 'local review' )
    local list = vim.fn.getloclist( 0 )
    assert.equal( 1, #list )
    assert.equal( 2, list[1].lnum )
  end )

  it( 'keeps agent diagnostics distinguishable from other producers', function()
    local bufnr = scratch { 'one', 'two', }
    local foreign = vim.api.nvim_create_namespace 'pretend-language-server'
    vim.diagnostic.set( foreign, bufnr, { {
      lnum = 0,
      col = 0,
      message = 'from the language server',
      severity = vim.diagnostic.severity.ERROR,
    }, } )

    activity.diagnose( bufnr, { { line = 2, text = 'from the agent', severity = 'warning', }, } )

    local mine = activity.diagnostics( bufnr )
    assert.equal( 1, #mine )
    assert.equal( 'from the agent', mine[1].message )
    assert.equal( 'pi', mine[1].source )
    assert.equal( 1, mine[1].lnum )

    assert.equal( 2, #vim.diagnostic.get( bufnr ) )

    activity.clear_diagnostics( bufnr )
    assert.equal( 0, #activity.diagnostics( bufnr ) )
    assert.equal( 1, #vim.diagnostic.get( bufnr ) )
  end )

  it( 'ignores invalid buffers', function()
    local bufnr = vim.api.nvim_create_buf( false, true )
    vim.api.nvim_buf_delete( bufnr, { force = true, } )

    activity.mark_edit( bufnr, { { first = 0, last = 1, }, } )
    activity.ghost( bufnr, 0, 'text' )
    activity.diagnose( bufnr, { { line = 1, text = 'x', }, } )

    assert.same( {}, activity.marks( bufnr ) )
  end )
end )